PM / clock_ops: report clock errors from clk_enable()
If clk_enable() fails, then print a message so that the user can see
what is happening instead of silently failing to enable the clock.
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Reviewed-by: Ian Molton <ian.molton@codethink.co.uk>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
diff --git a/drivers/base/power/clock_ops.c b/drivers/base/power/clock_ops.c
index cad7190..e870bbe 100644
--- a/drivers/base/power/clock_ops.c
+++ b/drivers/base/power/clock_ops.c
@@ -33,6 +33,21 @@
};
/**
+ * pm_clk_enable - Enable a clock, reporting any errors
+ * @dev: The device for the given clock
+ * @clk: The clock being enabled.
+ */
+static inline int __pm_clk_enable(struct device *dev, struct clk *clk)
+{
+ int ret = clk_enable(clk);
+ if (ret)
+ dev_err(dev, "%s: failed to enable clk %p, error %d\n",
+ __func__, clk, ret);
+
+ return ret;
+}
+
+/**
* pm_clk_acquire - Acquire a device clock.
* @dev: Device whose clock is to be acquired.
* @ce: PM clock entry corresponding to the clock.
@@ -263,7 +278,7 @@
list_for_each_entry(ce, &psd->clock_list, node) {
if (ce->status < PCE_STATUS_ERROR) {
- ret = clk_enable(ce->clk);
+ ret = __pm_clk_enable(dev, ce->clk);
if (!ret)
ce->status = PCE_STATUS_ENABLED;
}
@@ -381,7 +396,7 @@
spin_lock_irqsave(&psd->lock, flags);
list_for_each_entry(ce, &psd->clock_list, node)
- clk_enable(ce->clk);
+ __pm_clk_enable(dev, ce->clk);
spin_unlock_irqrestore(&psd->lock, flags);